Effective water treatment relies on precise chemical application. For industries utilizing Polyaluminium Chloride (PAC) as a primary flocculant, understanding the nuances of PAC dosing is crucial for maximizing its performance and achieving optimal water quality. This guide aims to demystify the process, offering insights into best practices for PAC application in industrial settings.

The initial step in determining the correct PAC dosage is typically a 'jar test'. This laboratory procedure involves testing different concentrations of PAC on samples of the target water. By observing the floc formation, settling speed, and clarity of the treated water in small-scale reactors (jars), operators can identify the most effective dosage. This empirical approach ensures that the PAC is tailored to the specific characteristics of the wastewater, such as its turbidity, pH, and organic content.

pH control is another critical factor influencing PAC's efficacy. Polyaluminium Chloride generally performs best within a specific pH range. For acidic wastewater, adding alkaline substances to raise the pH may be necessary, while alkaline wastewater might require the addition of acidic agents. Adjusting the pH not only optimizes the coagulant's performance but can also reduce the overall chemical load required. Careful monitoring and adjustment of pH are therefore integral to successful PAC dosing strategies.

When it comes to applying PAC, it can be used either directly or in a pre-diluted solution. Direct addition involves introducing the solid PAC directly into the water stream. However, for more consistent and uniform dispersion, especially in large systems, preparing a diluted solution is often preferred. The dilution ratio, typically between 2% to 20% for solid PAC, should be carefully managed. Proper mixing and stirring during and after dosing are essential to ensure the PAC comes into full contact with contaminants, facilitating effective flocculation.

The sequence of chemical addition is also important. Generally, PAC should be introduced early in the treatment process, often before other treatment aids. If PAC is used in conjunction with other chemicals, such as polymers, understanding their compatibility and recommended dosing order is vital. Following the principle of adding coagulants first, followed by coagulant aids, usually yields the best results.

For industries looking to buy PAC, partnering with a knowledgeable supplier can provide valuable support in optimizing dosing protocols. We offer high-quality Polyaluminium Chloride and are dedicated to assisting our clients in achieving the most efficient and effective water treatment outcomes through informed application strategies. By mastering PAC dosing, you can significantly enhance your industrial water purification processes.